Lighting fixture for elongated tubular lamps



Oct. 28, 1952 D. WILMAN ETAL 2,616,027

LIGHTING FIXTURE FOR ELONGATED TUBULAR LAMPS Filed May 17, 1949 a sums-#614221 1 Oct. 28, 1952 D. WILMAN ETAL 2,516,027

LIGHTING FIXTURE FOR ELONGATED TUBULAR LAMPS Filed May 17, 1949 2 snnEwsfsfimm 2 fig 3. 2 F 3a. 2

2 Invewlrors: 8 DonaLcl WiLInan,

/4 RonaLd Augusfus CLavke, A5 C. W

Their Ai' lrovnea.

Patented Oct. 2 8 1952 nq altl. W mian,

C ark Isl wo York:

Application Max:131;

Thi sihvehtiohr ate o m r v d-vde a hr le qve iota-l gh ing,fixt re .and; isrmq e par c a ly irected: ow e ach b e o rs: r l hting. t resadap e t r c v ne or m r ubular ph ated, i ht ou c s, uch as he w ll. nown. fluo e ent ame- Suchlieh ine fixtures are us a y; f hak hci av h ga c annel. or hackhQneh ppor sth amp ;1 hps h baqkb h prov dine, r. f rm? .51 1. pa t f a; musing; h ch; ha a opening. capable; of receiving; the detachablev cover, the u t ng n.- ai ihg he cov r in. tsv final; mount d p sit n.

It has be nzproppsed o. provide in .co binat qn aisubs ial y rec an u a suppo an a b.- anti i res a e ar ev ce o tachm n er th s ppo and he device. bein ac pmt s ed, with a; pair o p r lle han e rshaped, mawhichihterfit with one a er and w ic a e o e v rga ed a a-ar n e tha rans: vers movement ofthevdevice iwi th respect to the support enables-the edge ofi one channel-shamed. rim-of thedevioeto clear theadjaoent edgeof the rim of-t-he support, whereafter-a swinging orfl v ta m ement of the dev ceh. el ti n to, thei uenq an ak macet s th obj t. o the pr sen nven i n, how: ever to provide-a detachable coveli, for a fit in ttherk nd r rr d-t wh h c l f being; ocked to nd. eadily d ta hab e r mrth housr eQ hefi e-hy m le;moveme t tthe over metarts he e f: wit i he ho s ng, E i fthfill 53 5 1 advan ag s-Lot,ther hventio iwi l. ap: pear m he; o o n e cription of: eepies; thereof.

Accordin yv We pr vide a ileta habtle-v ov r, 015,. transparent or translucent material, for a ligh ing fixture of the lgindset-forth wherein the cover is providedwi-th; end caps adapted-to retain and lock the cover in its final mounted position, the end caps being-axially movable of; the cover and having a portion thereofadapted toengage and interlock with a portion of the housing ofithe fixture.

In carrying the invention into efieet. the said portions; of the end caps may be so constucted asqsner 21 2 06 21 5 end, cap om-the sai p0. ions ofw h gby;anr pward; er -.1 ment aftheeover anti th n lcaris erehrt e interlockin pqrtiqhs. t? -3 151 1 mt housme are; d sen a ed, d mo nt the end caps tow d aszh. other trials of he; 095 78. 3 ebynerm ttingthetpyet ndr d apsr o pass freely through the opening in the housing.

.It is a further feature of the invention that we t e e la ta io ndltph t tl Augus ne Q En a d,,,. ss. g ors o. je eral Eleotrie, Qemnhny, atQflrhqm jfimi 1 NEW 1949,;SeriaLNm 3%,,652;

nterlocked (c1. 24t+emn 2? mar arrangeiorthe. h naps; tote hrsivi iwith es; ext nding along, upperhr sti edess. thereof and parallel to the axis'of the c oyer the idge eing adantedwt neraort. he. nd cap oha he r) unhermo t sl gs stt o neta nthe n. in. he. final, mquhted hQs iQh the maximum idt f, th end, zaps, ver; the 1.3.359 be n reater, ha ith maximumwidth Q ithe o en ngin; thehousing. a d-the emo a iqt he Qver n he. end-c ps f simt eh iis nehei ffe tea r a tilting movement so that the maximum widthfm het hd. a s, over the. is eje s. tpresh e e hthep a i heoperrehdie jthe musi g; her by allowl evergreen ahdi he mit rs. t -rga s;

g. resh. ttierethrot n,

' Alterna r iy hev or r their be pr ed with d esv extending, aloha he,v prg rm.0 ges h reofanti' th ehs apsmar e @Qhfifidi ntert w th nti en. sa hathe l i'di iid s x sg i the cover., In such, a asethe cover; is; retained and supported in the housing along its entire length Remo aL-Q tha orer.and nd th ii h hoiisihgis gah fiectedbr h war o eenter; he. over; and'il a si t iolczk..tr s rom .136 L A$i!lg;,@.ml mm" fthe caps w t hlo hen a a y Qt he heus haz an s5- m i me it of.

over and an s t m s? mum .wi thor t a ses t the ch enq aps p s s 'e eh fi ithe; a e it. the p hd oi he, nd en ca 5 ass ee th re h h:

It. l: ea1 12; ia es ,t b h -wd r the arrangements, herein mensiohaiv ehahe s rvihertq the h r when: ethetethe h u nga i th caps may: fre t ke. ce n hat the. neve i adap ed? o mo i i he nd. caps.

The foreee heg and: ether f u h me .e learlr; hpreqi t r om 1 lowi eds r emhQdi eh h h -hventi re renge being had to the accompanyia r wings femiing art-Q h ri c fi nih: hich F s- .Land z areperspe tire ewsq afi ture f r a hulair. eipnaatl i amphavinaa de achab eq eraceordancewith tnQ IQVQ P IQQi Fi s-Brant tart 5a, Gland. 6 hQw. qhemat gitally h on r tiohsth eessa y fo th wher in; he c ver fr m th heusingrli'iggtis a. sehematici representatiqn. of; n. nt r m he, tru ture different than a lshowh h Hg :to. Stand also use ul hlthe Referring to Fig. 1 there is shown generally at I, a lighting fixture having a housing 2 forming h91iihg,, hereby all t erore referred to, 'd-isupporting channel or backbone for the fixture, and a cover 3 of translucent material, such as glass or an organic plastic, retained and locked thereto in its final mounted position, by means of the end caps 4. The longitudinal axis of the cover is represented by the chain dotted lines XX. In Fig. 2 a portion of the cover 3 and one end cap 4 is partly removed from the housing 2 and this facilitates a consideration of the manner in which the cover and the end caps are retained in and locked to the housing 2. The uppermost edges 5 of the cover 3 parallel with the axis XX (Fig. 1) are provided with ridges ,6 upon which the end caps 4 slide axially of the cover, the end caps having ridges l which interfit with the ridges 6 of the cover. The uppermost edge of the end wall 8 of the end caps is L-shaped to form a channel portion 9 which interlocks with an inverted L-shaped portion H] of the end walls ll of the housing 2 thereby locking the end cap to the housing. The lower edges [2 of the side Walls l3 of the housing are turned inwardly as shown in Figs. 3 to 6a.

It is to be understood that the locking of the end caps to the housing may be effected by other well known methods, for example as shown in Fig. 7 bulbous headed members [4 may be attached to the housing 2 and adapted to interfit and interlock with suitable holes and/or slots l5 in the upper portion of the walls 8 of the end caps.

' Referring now to Figs; 3-611 it will be noted that inFigs. 3, 3a the cover 3 and end caps 4 are in their final mounted position within the housing 2, the distance X over the ridges 6 and 1 being larger than the opening between the inturned edges 12 of the housing 2 thereby retaining the cover and the end caps, the L-shaped portions 9 of the cover and the L-shaped portions 10 of the housing being in interlocking relationship, Fig. 3a.

To remove the cover 3"from the housing 2 the cover and the end caps are lifted in the direction of arrow Y (Fig. 4, 4a) so that the L-shaped portions 9 of the end caps are disengaged from the inverted L-shaped portions H] of the housing.

The end caps are now moved together axially of the cover (Fig. 5a) and the cover and the end' caps are tilted as shown in Fig. 5, so that the distance X over the ridges is foreshortened. to the distance Y in the plane of the opening of the housing thereby permitting the cover to pass freely therethrough (Fig. 6, 6a).

What we claim as new and desire to secure by Letters Patent of the United States is:

1. In alighting fixture of thev type having anv elongated housing provided with a longitudinal opening defined by side walls and end walls, i1- luminating means supported by said housing and an elongated cover for the opening in the housing and supported by said housing, that improvement in the mounting of the cover onthe housing.

which comprises end caps mounted on the cover and movable longitudinally thereof into a first position in which the overall length of said'cover and said caps is less than the length of said opening to facilitate'mounting and dismounting said cover and into a second position in which the caps engage the end walls'of the 0pening, andj interlockings'upport means on thesa'id caps and on the inner side of the end walls of said opening, said means being engageable when said caps are in said second position and being disengageable 4. by inward movement of the cover with respect to the housing.

2. That improvement in the mounting of the cover on the housing as claimed in claim 1 wherein the end caps are provided with ridges along the sides thereof extending longitudinally of the cover, said ridges extending outwardly to increase the width of the caps to a width greater than that of the opening in the housing, and wherein the side walls of the housing have inturned edges engaging said ridges and the housing is of suificient depth and width to provide space above the opening for sideward tilting therewithin of the cover and the caps to foreshorten the width of the caps in the plane of the opening to less than the width of the opening to facilitate mounting and dismounting of said cover.

3. That improvement in the mounting of the cover on the housing as claimed in claim 1 wherein the end caps and the cover are provided with ridges along the sides thereof extending longitu- I dinally of the cover, said'ridges extending outwardly to increase the width of the caps and the cover to a width greater than that of the opening in the housing, and wherein the side walls and end walls of the housing have inturned edges engaging said ridges and the housing is of suificient depth and width to provide space above the opening for sideward tilting therewithin of the cover and the caps to foreshorten the width of the caps and the cover in the plane of the opening to less than the width of the opening to facilitate mounting and dismounting of said cover. 7

4. A lighting fixture for elongated lamps comprising in combination, a trough-shaped housing having end walls and side walls defining an opening and being adapted for mounting in a downwardly opening position, a light transmitting cover of generally channel form for the said open ing and end caps mounted on the cover and supporting said cover on said housing, the lower edges of the said end walls of said housing being turned inwardly and upwardly of said housing and the upper edges of said caps being turned REFERENCES CITED The following references are of record in the file of this patent: j

UNITED STATES PATENTS Number Name Date' 1,997,687 Hoegger Apr. 16, 1935 2,269,182 Elaspy Jan. 6-, 1942 2,319,732 Guth May 18, 1943 2,336,599 Dunbar Dec. 14, 1943 2,427,084 Alderman Sept. 9, 1947 2,440,603 Guth Apr. 2'7, 1948 2,490,191

Baker Dec; 6, 1949 

